Eddie Brock bonded to the alien symbiote after it was discarded by Spider-Man, becoming the first Venom. Brock was later Anti-Venom, but the symbiote was lost during Spider-Island. He has recently been forcibly bonded to the Toxin symbiote by the Crime Master.

Anti-Venom
Eddie Brock as Anti-Venom

New Ways to Die

While once again praying at a church, Brock was discovered by philanthropist named Martin Li who is secretly Mr. Negative. After Matt Murdock proves in a court of law that Brock was not responsible for his actions while bonded to the Symbiote and has Eddies charges dropped, Li gets Brock a job in his soup kitchen. Eddie began life as a cook and continued rounds of chemo-therapy in order to try and combat his cancer. When Eddie believed his terminal cancer was about to kill him, a touch from Mr. Negative charged the remnants of the Venom Symbiote within his body and activated them causing them to bond to his white-blood-cells (leukocytes). This created a brand new, non-sentient symbiote that lived within Eddie's bloodstream secretly healing his body of cancer.